Mitutoyo Inside Micrometer – Extension Type 50–500 mm

This Mitutoyo Inside Micrometer Set (50–500 mm) is designed for high‑accuracy internal measurement across a broad range of bore sizes. The extension‑type system allows the micrometer head to be paired with different rods and anvils, providing stable alignment and repeatable readings from small bores through to large internal dimensions.

The micrometer head features crisp graduations and a smooth thimble feel, while the extension rods are precision‑ground for straightness and rigidity. This set is ideal for machining, toolmaking, jig building, mold work, engine rebuilding, and inspection environments where wide‑range internal measurement is required.

Mitutoyo’s extension‑type inside micrometers are known for their accuracy, durability, and long‑term workshop reliability.

Brand Information

Mitutoyo (Japan) A world‑leading manufacturer of precision metrology instruments used across machining, aerospace, automotive, and inspection industries.

Features and Performance

• 50–500 mm measuring range — Covers small, medium, and large internal dimensions.
• Extension‑rod system — Modular configuration for multiple bore sizes.
• 0.01 mm resolution — Fine graduations for tight‑tolerance measurement.
• Precision‑ground rods — Straight, rigid, and stable under measurement load.
• Smooth thimble action — Consistent feel for repeatable readings.
• Japanese build quality — Durable, accurate, workshop‑ready.

Included

• 1 × Mitutoyo Inside Micrometer Head (0.01 mm resolution)

• Extension rods (full set as shown)

• Storage case (normal wear, still in good condition)

Specifications

Keywords

Mitutoyo inside micrometer; extension‑type mic; 0–500 mm micrometer; internal measuring tool; 0.01 mm resolution; Japanese metrology instrument; machinist inside mic; precision bore measurement.